Canopy clamping device for oxygen tents



-l 1, 1954 R. J. READING 2,687,726

CANOPY CLAMPING DEVICE FOR OXYGEN TENTS Filed Jan. 11, 1952 3 Sheets-Sheet 1L INVENTOR RoberZJKeadi/zy ATTORNEYS Aug. 31, 1954 R. J. READING CANOPY CLAMPING DEVICE FOR OXYGEN TENTS 3 Sheets-Sheet 2 Filed Jan. 11, 1952 INVE NTOR RoberiJReadzhg BY wmysw ATTORN EYS Aug. 31, 1954 R. J. READING CANOPY CLAMPING DEVICE FOR OXYGEN TENTS 3 Sheets-Sheet 3 Filed Jan, 11, 1952 INVENTOR 9 M A ITQ RN EYS rr n VW rA Patented Aug. 31, 1954 t l V UNITED STATES PATENT OFFICE CANOPY CLAMPING DEVICE FOR OXYGEN TENTS Application January 11, 1952, Serial No. 266,013 11 Claims. (01. 128191) 1 2 As conducive to an understanding of the inven- Fig. 5 is a view taken along line 55 of Fig. 2, tion, it is noted that where the oxygen canopy, Fig. 6 is a fragmentary view showing the reinwhich is positioned over the bed, has its usual forced opening in the canopy, and opening encompassing the juxtaposed inlet and Fig. 7 is a front view of the clamping frame.

outlet of the oxygen tent and is afiixed to the 5 Referring now to the drawings, in. Fig. 1 is wall of the latter by means of a clamping frame shown an oxygen tent H which may include a secured by screws or nuts and bolts, the clamping refrigerator unit I 2 which is connected through of the canopy in position is both laborious and suitable conduits to a cooling chamber I3 in the time-consuming and requires the use of special upper portion of the oxygen tent. The cooling tools such as screw drivers and wrenches. 10 chamber 13 may be positioned directly over an It is accordingly among the objects of the intake chamber l4 desirably being separated invention to provide a clamping frame which is therefrom by a substantially horizontal partition relatively simple in construction having but few l5. Desirably an oxygen supply line l6 has its parts that are not likely to become deranged, outlet end ll leading into the intake chamber 14. which frame may readily be incorporated with 5 A suitable suction fan 3 serves to draw the the conventional oxygen tent with but slight exhaled air from a canopy I 9, which may be changes in the construction thereof and which, positioned over a bed 2! on which a patient may with but a few simple manipulations, will dependbe reclining, through the substantially rectanguably retain the periphery of an opening in the lar inlet 22 of the intake chamber M, which may canopy against the oxygen tent without the use 0 have a suitable filter associated therewith and of screws or bolts and without the need of any such air together with the oxygen is circulated by tools, yetwith assurance that a dependable seal the fan through the cooling chamber Hi to be will be effected. discharged through its substantially rectangular According to the invention the clamping frame outlet 24. which is to be positioned over the substantially According to the invention, means e s rectangular inlet and outlet openings of the intake y p d to facilitate the ee t 0f t e and cooling chambers of the oxygen tent is desirca opy W to the oxygen tent l I so that a substanably substantially rectangular generally conformtially ir tight seal may be effected between such ing to the combined dimensions of such inlet and c nopy and the inlet 22 and outlet 24 of the outlet, one of which is usually positioned above intake and cooling chambers which are in comthe other in an opening in a wall of the oxygen munieetieh With the interior of e a opy tent. The clamping frame is hingedly mounted, through a substantially rectangular Ope 28 desirably along one edge, so that it may be moved n the l" w 29 0f the Oxygen tentfrom opened to closed position. Means are proo this e d a py Clamping member i desirvided to retain the clamping frame in juxtaposiably prov d d w i h ay comprise a substantially tion to the wall of the oxygen tent when the frame rectangular frame 27 preferably f t al minum is substantially in closed position so that the w h is of substantially h s me im nsions periphery of the opening in the oxygen canopy as rectangu ar ope AS h wn n which is positioned between the frame and the the frame 21 desirably has a plurality of longirim of the opening in the oxygen tent, may be tudinal louvres SI and 32, directed upwardly and retained against such rim. Desirably cam means downwardly respectively and Separated y 811011- are provided to effect movement of the clamping gitudiha'l Strip 33 Substantially midway between frame, after it has been thus retained in juxtathe upper and lower edges 35 of the frameposition to the wall of the oxygen tent, toward The strip 3 desirably has a r w rdly x ndthe latter to press the rim of the frame against ins flange 36 p eferably formed integral therethe periphery of the canopy to provide s. depend- With, the edge 31 Of which, When e frame s able seal, and resilient means are desirably proin locked po W ll abut a a s a resilient vided to retain the clamping frame in such Strip preferably of rubber, effixed 0 the e clamped position. 39 of partition 15 to provide a seal between the In the accompanyin drawings i hi i inlet 22 and outlet 2 of the intake chamber 14 shown one of various possible embodiments of and cooling Chamber 3- the several features of the invention, The frame 21 is pivotally mounted to the rear Fig. 1 is a sectional view of an oxygen tent wall 29 of the oxygen tent so that it may be and canopy illustrating the mode of use of the moved into and out of juxtaposition with the clamping frame, opening 28. To this end a pair of hinges 4| are Fig. 2 is a fragmentary detail sectional view on located respectively, near h id edges 42 Of alarger scale of the clamping frame, the frame ll. Each hinge comprises a pair of Fig. 3 is a view similar to Fig. 2 on a greatly complementary hinge members 43 and 44, the enlarged scale showing the locking assembly, members 43 being affixed respectively as by weld- Fig. 4 is a sectional view taken along line 4-4 mg as at 45 near each of the ends of elonof Fig. 3, gated supporting members 46, the latter being afably extending parallel thereto. Desirably the floor 49 of the intake chamber It has a resilient strip at its edge 52 against which the supporting member 46 may abut as at 53 to provide a seal. The hinge member 43 coactswith the com plementary hinge member 44 which, as shown in Fig. 2, desirably has a rearwardly extending arm 54 with an upwardly curved extension 55, the latter having a mounting portion 56" which extends at right angles to arm 5%. The mounting portions 56 of. the hinge members 44 are affixed respectively as. by bolts: 51 to the free ends 58" of the depending, arms 59 of substantially L-shaped brackets 6f, the latter each hav ing. an arm 62. extending at right angles to arm 59 and affixed as by screw 63 to the flange 35 near each of the ends thereof respectively.

Encompassing. the periphery of the opening28 and affixed to. the outer surface thereof is a resilient strip 65, preferably of rubber, through which extends a plurality of mounting studs 66', the latter desirably being. mounted on and spaced along the upper and lower edges of' opening 28.

With the. construction thus described, the frame 21 may be pivoted on the. hinges 4! so thatits rim canbe moved into andv out of juxtae position with. the resilient strip 55, from the position shown in full lines in Fig. 2 to the. position shownin. broken lines. Desirably the rim of the frame 21- has a plurality of recesses 68' therein to: receive an associated stud B'ii when the frame is moved .to closed position as shownin Fig.2. Thus, the rim of. the. frame may be snugly seated against resilient strip- 55 to effect a dependable seal.

Means are provided securely to retain the rim of. frame 21. against. resilient strip 65.. To this end, as shown inFigs. land 3,. a locking. assembly 1.0 is mounted on frame 21 near the upper edge 34 thereof substantially midway between its side edges. 42. The locking. assembly desirably comprises. a latch member which may be a substantially cylindrical stud1l having. an outstanding annular flange 12. near one end. thereof with an axial extension 13; which mounts a substantially rectangular locking head 1 3. The. stud. 1! is desirably threaded along its length as at 1 5 between flange '12 and its. end 16 and extends through a bore 11. in a downwardly extending block 18 dcsirably formed integral with the upper edge 34 of the. frame midway between. the side edges 42 thereof. Screwed. on said stud 1!, is a hollowcap 119, which. desirably is of reduced. outer diameter as. at. 8! defining. a shoulder 82'. The reduced portionof' cap 19 is rotatable in here 1.1, and a coil spring 83 compressed. between flange 12. and a shoulder 84 formed by an enlargement 85. of. bore 11 normally retains shoulder 82 of cap 19 against the outer periphery 86 of'bore 11'.

Associated with the locking head 16' is a substantially rectangular locking plate 81 afiixedlat itsupper edge to and. depending froma channel member 89' extending longitudinally of. the upper edge of. opening 28 and afhxedto the inner surface of wall 29'. Desirably the top wall 9 of cooling chamber i3 has .a resilient strip 92 at its outer edge 93which engages channel member 89 to provide a seal. The plate 81' desirably has a substantially rectangular opening it therein which; when the frame 2'5" is moved to locking position will be substantially aligned with locking head Ma The dimensions of opening 94 are but slightly iarger than that of locking head 1'4 28 therein and desir-- at its free end" so that when the latterismoved into the opening 94 and rotated in the manner hereinafter to be described, the frame 21 will be locked to the plate. In order to rotate the locking head 14, the yoke end as of a handle 91 is so positioned that the legs 98 of the yoke straddle the end of cap 19'. By means. of a pin 99 which extends through legs 98,. cap 18 and through the bifurcated end 1M of stud 1|, the handle is securely retained in place,

As shown in Fig. 3, the ends I02 of legs 98 are desirably formed-with cam conformations so that upon movement of the handle from the position shown in Fig. 3 to the position shown in Fig. 2, the frame 21 will be cammed inwardly against the. tension of'coil. spring 83. By reasonof' the tensed coil spring. 83 and cam conformations; the handle 9? willsecurely, yet rel'easably be retained in such upper position.

To affix the canopy 19 to the oxygen tent H with the clamping frame 21 in open position as shown in broken lines in Fig. 2; the substantially rectangular opening H34 in the canopy is stretched over the frame 21 so that the. studs 66 will extend through corresponding openings ['05 in the. reinforcedv upper and lower edges of the opening NM.

The clamping frame 21 is then pivoted on its hinges 4! toward closedv position and the handle 91' is rotated. degrees from the position shown in Fig, 3 so that the. locking head 14 will be aligned with opening. 94 in looking plate 81. The handle is thenpr'essed inwardly so that the locking head. will pass through. opening 94 and the handle is thereupon rotated .90 degrees to the locked or closed position shown in Fig. 3'. By reason of the coil spring 83 which reacts against frame 21,. the rim of the latter will. be slightly spaced from the periphery of the opening FM in the canopy so that different thicknesses can be accommodated; To move the rim of the frame into clamping. position. against such periphery, it is'merely necessary to lift the handle to' the position shown inFig. 2. As a result, the cam conformations will move the frame against, the resistance of coil spring 83 so that the rim of the frame will press or clamp the reinforced periphery of the canopy tightly against resilient strip 65, to effect a dependable seal.

With. the construction thus described, the canopy may be securely yet removably ailixed to: the oxygen tent without need for the use of any tools to loosen screws or nuts. The camming action. effected will" move the rim of the clamping frame against the rim of the opening of: the canopy to retain the latter against the resilient: strip 65 with resultant dependable sealing action.

As many changes could be made in the above construction, and many apparently widely" different' embodiments of this invention could. be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as' illustrative and not irra limiting sense.

Having thus described myinvention, what I claim as new and desire to secure by Letters Patent of the United States is:

I. An oxygen tent having, a'w'a'll with an opening therein, a clamping frame, meanshin'gedly mounting said frame on said" wall so as to; be movable from open position to closed position in juxtaposition to saidopening, locking mean' to tion, a

retain said frame in such closed position, a handle to control said locking means, means upon movement of said handle to effect movement of said frame from such closed position to clamping position and means to lock the frame in such clamping position.

2. The combination set forth in claim 1 in which a locking plate is mounted on said wall, said plate having an elongated opening therein, a locking stud rotatably and slidably mounted in a bore in said frame extending at right angles thereto, said stud having an elongated locking head of dimensions slightly smaller than said elongated opening so that when said frame is moved to closed position, said locking head may enter said elongated opening, means to rotate said stud whereby said locking head will engage the periphery of said elongated opening to retain the frame in closed position, cam means coacting with said frame to slide the latter along said stud to move the frame to clamping position and resilient means coacting with said cam means to lock the frame in clamping position.

3. The combination set forth in claim 1 in which a locking plate having an elongated opening therein is mounted on said wall, said frame having a'block adapted to be aligned with said locking plate when the frame is in closed posistud extending through a bore in said block at right angles thereto, said stud having a flange near its inner end with an axial extension having an elongated locking head at the end thereof of dimension slightly smaller than said elongated opening so that when saidframe is moved to closed position, said locking head may enter said elongated opening, a cap afixed on the other end of said stud on the outer side of said frame, said cap having an external shoulder adapted to engage the outer periphery of said bore, a coil spring coacting with said flange and the inner side of said frame normally to urge the locking head inwardly to retain the shoulder of said cap on said periphery and means to rotate said stud whereby the locking head will engage the periphery of said elongated opening.

4. An oxygen tent comprising a wall with a substantially rectangular opening therein, a substantially rectangular clamping frame of dimensions slightly larger than the dimensions of said opening, means hingedly mounting said frame along one edge thereof on said wall so as to be movable from open to closed position in juxtaposition to said opening, means releasably to retain the frame in such closed position, a handle controlling said means, means upon movement of said handle to effect movement of said frame from such closed position to clamping position with the rim of said frame pressed against the periphery of said opening and means to lock the frame in such clamping position. l

5. The combination set forth in claim 4 in which said oxygen tent has a substantially rectangular inlet and a substantially rectangular outlet positioned one above the other, said inlet and outlet being in communication with said opening and said frame has a pair of sets of longitudinal louvres thereon directed upwardly and downwardly respectively and associated respectively with said outlet and inlet.

6. The combination set forth in claim 4 in which said oxygen tent has an intake chamber and a cooling chamber with a substantially horizontal partition therebetween, said chambers having a substantially rectangular inlet and a substantially rectangular outlet associated therewith, positioned one above the other and in communication with said opening, the edge of said partition being between said inlet and outlet adjacent said opening, and said frame having a pair of sets of longitudinal louvres therein directed upwardly and downwardly respectively and associated respectively with said outlet and inlet, said sets of louvres having a longitudinal strip therebetween with a rearwardly extending longitudinal flange, said flange abutting against the edge of said partition to form a seal when the frame is in closed position.

'7. The combination set forth in claim 6 in which the edge of said partition has a resilient strip thereon against which said flange abuts.

8. An oxygen tent comprising a wall with a substantially rectangular opening therein, a plurality of mounting studs ailixed to the periphery of said opening and extending outwardly from said wall, a clamping frame, means hingedly mounting said frame on said wall so as to be movable from open position to closed position in juxtaposition to said opening, said frame having a rim of dimensions corresponding to those of the periphery of said 0 ening, said rim having recesses therein aligned with said studs when the frame is in closed position, means to retain said frame in such closed position, a handle controlling said means, means upon movement of said handle to efiect movement of said frame from such closed position to clamping position and means to lock the frame in such clamping position.

9. The combination set forth in claim 8 in which a resilient strip is affixed to the periphery of said opening and said mounting studs extend through said resilient strip.

10. The combination set forth in claim 8 in which an oxygen canopy is provided having a substantially rectangular opening therein of dimensions such that the periphery of said opening may be passed over said frame, said periphery having a plurality of openings therethrough through which an associated mounting stud can extend, properly to position the periphery of the opening in the canopy with respect to the substantially rectangular opening in said oxygen tent.

11. An oxygen tent having a wall with an opening therein, a clamping frame, means hingedly mounting said frame on said wall so as to be movable from openposition to closed position in juxtaposition to said opening, said hinge means comprising a hinge member afiixed to the wall of said oxygen tent, a complementary hinge member comprising an arm pivotally connected at one end to said first hinge member and extending inwardly of said wall, a curved extension rising from the other end of said arm, said extension being affixed at its free end to said frame, means to retain said frame in such closed position, a handle controlling said means, means upon movement of said handle to effect movement of said frame from such closed position to clamping position and means to lock the frame in such clamping position.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,226,824 Larson Dec. 31, 1940 2,400,558 Lindberg May 21, 1946 2,533,674 Locke Dec. 12, 1950, 

